I have only had my Cobalt one month but the car is really growing on me. I bought it because of an excellent lease option and GM card money. It has more than enough power and gets excellent gas mileage. Judging by the performance of the naturally aspirated 2.2 the SS edition should be a rocket.
My favorite feature is the driver information center.
I would add the auto dimming rear view mirror and more adjustments to the driver seat.